These are one of the top features that i like when talking about the new technologies. Their purpose is to reduce the number of the circulating coins/tokens which means that the initial circulating supply might be so high which influences on the price and might causes a growth decrease. Burning some sort of amount when a transaction is being confirmed will bring more investors because a lower circulating supply means a higher price in the future which is just going to make investor's hype grow day by day. It's good, that rule might not be always valid but that's the deal.